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EN 10083-3 34CrNiMo6 vs BS 970 (Part 3) 817M40

Close Alternative — 76% match based on chemical composition and mechanical property overlap.

EN 10083-3 34CrNiMo6 (EN 10083-3:2006) and BS 970 (Part 3) 817M40 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Alloy Steel category. EN 10083-3 34CrNiMo6 is typically used for heavy duty shafts, crankshafts, gears, high tensile components, while BS 970 (Part 3) 817M40 is commonly used for high tensile shafts, gears, crankshafts. EN 10083-3 34CrNiMo6 is defined under European Standard (EN), originating from Europe, while BS 970 (Part 3) 817M40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, EN 10083-3 34CrNiMo6 vs BS 970 (Part 3) 817M40 is a 76% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 76%.

Frequently Compared With EN 10083-3 34CrNiMo6:
NF A35-565 100C6 GB/T 3077 12Cr2Ni4A UNI 11234 100Cr6 GOST 4543 12HN3A IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 4367 07Cr4Mo6
Match Breakdown
CHEMISTRY MATCH
76%
MECHANICAL MATCH
No shared data
OVERALL
76%
Specifications
Property EN 10083-3 34CrNiMo6 BS 970 (Part 3) 817M40
Standard EN 10083-3:2006 BS 970 (Part 3):1991
Category Alloy Steel Alloy Steel
C (%) 0.30-0.38 0.36-0.44
Cr (%) 1.30-1.70 1.00-1.40
Mn (%) 0.50-0.80 0.45-0.70
Mo (%) 0.15-0.30 0.20-0.35
Ni (%) 1.30-1.70 1.30-1.70
P (%) <=0.025 <=0.035
S (%) <=0.035 <=0.040
Si (%) <=0.40 0.10-0.40
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property EN 10083-3 34CrNiMo6 BS 970 (Part 3) 817M40
Condition Quenched and tempered (+QT), ruling section d <= 16 mm Not specified
Elongation 9% min Not specified
Hardness Soft annealed (+A): 248 HBW max Not specified
Tensile Strength 1200 to 1400 MPa Not specified
Yield Strength 1000 MPa min Not specified
Typical Applications
EN 10083-3 34CrNiMo6
Heavy duty shafts, crankshafts, gears, high tensile components
BS 970 (Part 3) 817M40
High tensile shafts, gears, crankshafts
Can EN 10083-3 34CrNiMo6 Be Substituted With BS 970 (Part 3) 817M40?
EN 10083-3 34CrNiMo6 and BS 970 (Part 3) 817M40 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
Forms & Sizes Available on M-EX
EN 10083-3 34CrNiMo6
Round Bar → (3 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 3300–4000 mm (129.92–157.48 in)
BS 970 (Part 3) 817M40
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6200–6500 mm (244.09–255.91 in)
On M-EX Right Now
EN 10083-3 34CrNiMo6
3 active listings and RFQs →
BS 970 (Part 3) 817M40
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between EN 10083-3 34CrNiMo6 and BS 970 (Part 3) 817M40?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can EN 10083-3 34CrNiMo6 be substituted with BS 970 (Part 3) 817M40?
EN 10083-3 34CrNiMo6 and BS 970 (Part 3) 817M40 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.